# Numbers you may repeat, and numbers you may not

Study notes. Not vendor documentation and not legal advice.

- Zoom's API sample shows expires_in 3599, and the prose says tokens are valid for one hour.
- Talkdesk's authentication markdown front matter says updatedAt 2026-09-10.
- IANA's SIP registry page says Last Updated 2026-08-17.
- Wikipedia's Avaya extract says more than 90,000 customers.
- Prices, ports, exam scores, and roadmap months were not opened.

Make a two-column card: repeat, and confirm. Repeat only the four facts in the five-minute list, each with its page. Put license price and port numbers in confirm.